45640145 has 4 divisors (see below), whose sum is σ = 54768180. Its totient is φ = 36512112.

The previous prime is 45640141. The next prime is 45640151. The reversal of 45640145 is 54104654.

45640145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54104654 = 2 ⋅27052327.

It can be written as a sum of positive squares in 2 ways, for example, as 8271376 + 37368769 = 2876^2 + 6113^2 .

It is a cyclic number.

It is not a de Polignac number, because 45640145 - 2² = 45640141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (45640141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4564010 + ... + 4564019.

It is an arithmetic number, because the mean of its divisors is an integer number (13692045).

Almost surely, 2^45640145 is an apocalyptic number.

It is an amenable number.

45640145 is a deficient number, since it is larger than the sum of its proper divisors (9128035).

45640145 is an equidigital number, since it uses as much as digits as its factorization.

45640145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9128034.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 45640145 is about 6755.7490332309. The cubic root of 45640145 is about 357.3680083914.

Adding to 45640145 its reverse (54104654), we get a palindrome (99744799).

The spelling of 45640145 in words is "forty-five million, six hundred forty thousand, one hundred forty-five".